AP BIOLOGY PRACTICE EXAM
MULTIPLE CHOICE QUESTIONS AND
ANSWERS 1
The resting membrane potential depends on which of the following?
rr rr rr rr rr rr rr rr rr
1. active transport
rr rr
2. Selective permeability
rr rr rr
3. Differential distribution of ions across the axonal membrane - ans-1, 2, and 3
rr rr rr rr rr rr rr rr rr rr rr rr rr
The Krebs cycle in humans releases - ans-carbon dioxide
rr rr rr rr rr rr rr rr
a heterotroph - ans-obtains its energy by catabolizing organic molecules
rr rr rr rr rr rr rr rr rr
Regarding meiosis and mitosis, one difference between the two forms of cellular reproduc
rr rr rr rr rr rr rr rr rr rr rr rr
tion is that in meiosis - ans-
rr rr rr rr rr rr
separation of sister chromatids occurs during the second division, whereas in mitosis sep
rr rr rr rr rr rr rr rr rr rr rr rr
aration of sister chromatids occurs during the first division
rr rr rr rr rr rr rr rr
a feature of amino acids that is not found carbohydrates is the presence of - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
nitrogen atoms rr
Which of the following is NOT a characteristic prokaryotic cells - ans-Membrane-
rr rr rr rr rr rr rr rr rr rr rr
bound cellular organelles rr rr
Which of the following best explains why a population is describe as the evolutionary unit
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
- ans-Individuals cannot evolve, but populations can
rr rr rr rr rr rr
The endocrine system maintains homeostasis using many feedback mechanisms. which
rr rr rr rr rr rr rr rr rr rr
of the following is an example of positive feedback - ans-
rr rr rr rr rr rr rr rr rr rr
Infant suckling causes a mother's brain to release Oxytocin , which in turn stimulates milk
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
production
A scientist carries out a cross between tow guinea pigs, both of which have black coats. B
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
lack hair coat is dominant over white hair coat. Three quarters of the offspring have black
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
coats, and one quarter have white coats. The genotypes of the parents were most likely -
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
ans-Bb Bb
rr rr
A large island is devastated by volcanic eruption. Most of the horsed ides except for the h
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
eaviest males and heaviest females of the group. They survive , reproduce, and perpetua
rr rr rr rr rr rr rr rr rr rr rr rr rr
te the population. If weight is highly heritable trait, which graph represents the change in p
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
, opulation before and after the eruption. - ans- rr rr rr rr rr rr rr
A higher mean weight compared with members of the original population
rr rr rr rr rr rr rr rr rr rr
All of the following play a role in early embryogenesis EXCEPT - ans-Operons
rr rr rr rr rr rr rr rr rr rr rr rr
During the period when life is believed to have begun., the atmosphere on primitive Earth
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
contained abundant amounts of all the following gases EXCEPT - ans-Oxygen
rr rr rr rr rr rr rr rr rr rr
The small intestine is the main site of absorption. It can accomplish it so efficiently becaus
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
e of villi and microvilli that sculpt the membrane into hair-
rr rr rr rr rr rr rr rr rr rr
like projections. They likely aid in reabsorption by - ans-
rr rr rr rr rr rr rr rr rr
Increasing the surface area of the small intestine rr rr rr rr rr rr rr
The pancreas is a major accessory organ in the digestive system. Which of the following
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
would destroy the function of digestive products produced by the pancreas - ans-
rr rr rr rr rr rr rr rr rr rr rr rr
Increased acidity due to the inability to neutralize stomach acid rr rr rr rr rr rr rr rr rr
In animal cells, which of the following represents the most likely pathway that a secreted p
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
rotein takes as it is synthesized in a cell - ans-Ribosome - rough ER - Golgi apparatus -
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
secretory vesicle - plasma membrane
rr rr rr rr rr
All of the following statements are correct regarding alleles EXCEPT - ans-
rr rr rr rr rr rr rr rr rr rr rr
An individual with tow identical alleles is said to be heterozygous with respect to that gene
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
Once specific genes, such as the gene coding for ampicillin, have been incorporated into
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
a plasmid, the plasmid may be used to carry out a transformation, which is - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
Inserting it into a suitable bacterium rr rr rr rr rr
Although mutations occur at a regular and predictable rate, which of the following stateme
rr rr rr rr rr rr rr rr rr rr rr rr rr
nts is the LEAST likely reason the frequency of mutation often appears to be low - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
The predictable rate of mutation results in ongoing variability in a gene pool
rr rr rr rr rr rr rr rr rr rr rr rr
A scientist wants to test the effect of temperature on seed germination. Which of the follo
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
wing should be part of the experimental design - ans-
rr rr rr rr rr rr rr rr rr
Use the temperature as the independent variable and measure the rate of germination
rr rr rr rr rr rr rr rr rr rr rr rr
A mustard plant seed undergoes a polyploidy event resulting in the new plant's pollen bei
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
ng unable to pollinate the plant that originally produced the seed despite them being less t
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
han a meter. apart this best exemplifies which of the following - ans-
rr rr rr rr rr rr rr rr rr rr rr rr
Sympatric spectiation because the plants are not separated rr rr rr rr rr rr rr
Which of the following is the most correct concerning cell differentiation in vertebrae -
rr rr rr rr rr rr rr rr rr rr rr rr rr
ans-
rr
Differences in the timing and expression levels of different genes lead to structural and fu
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
nctional differences rr
MULTIPLE CHOICE QUESTIONS AND
ANSWERS 1
The resting membrane potential depends on which of the following?
rr rr rr rr rr rr rr rr rr
1. active transport
rr rr
2. Selective permeability
rr rr rr
3. Differential distribution of ions across the axonal membrane - ans-1, 2, and 3
rr rr rr rr rr rr rr rr rr rr rr rr rr
The Krebs cycle in humans releases - ans-carbon dioxide
rr rr rr rr rr rr rr rr
a heterotroph - ans-obtains its energy by catabolizing organic molecules
rr rr rr rr rr rr rr rr rr
Regarding meiosis and mitosis, one difference between the two forms of cellular reproduc
rr rr rr rr rr rr rr rr rr rr rr rr
tion is that in meiosis - ans-
rr rr rr rr rr rr
separation of sister chromatids occurs during the second division, whereas in mitosis sep
rr rr rr rr rr rr rr rr rr rr rr rr
aration of sister chromatids occurs during the first division
rr rr rr rr rr rr rr rr
a feature of amino acids that is not found carbohydrates is the presence of - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
nitrogen atoms rr
Which of the following is NOT a characteristic prokaryotic cells - ans-Membrane-
rr rr rr rr rr rr rr rr rr rr rr
bound cellular organelles rr rr
Which of the following best explains why a population is describe as the evolutionary unit
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
- ans-Individuals cannot evolve, but populations can
rr rr rr rr rr rr
The endocrine system maintains homeostasis using many feedback mechanisms. which
rr rr rr rr rr rr rr rr rr rr
of the following is an example of positive feedback - ans-
rr rr rr rr rr rr rr rr rr rr
Infant suckling causes a mother's brain to release Oxytocin , which in turn stimulates milk
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
production
A scientist carries out a cross between tow guinea pigs, both of which have black coats. B
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
lack hair coat is dominant over white hair coat. Three quarters of the offspring have black
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
coats, and one quarter have white coats. The genotypes of the parents were most likely -
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
ans-Bb Bb
rr rr
A large island is devastated by volcanic eruption. Most of the horsed ides except for the h
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
eaviest males and heaviest females of the group. They survive , reproduce, and perpetua
rr rr rr rr rr rr rr rr rr rr rr rr rr
te the population. If weight is highly heritable trait, which graph represents the change in p
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
, opulation before and after the eruption. - ans- rr rr rr rr rr rr rr
A higher mean weight compared with members of the original population
rr rr rr rr rr rr rr rr rr rr
All of the following play a role in early embryogenesis EXCEPT - ans-Operons
rr rr rr rr rr rr rr rr rr rr rr rr
During the period when life is believed to have begun., the atmosphere on primitive Earth
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
contained abundant amounts of all the following gases EXCEPT - ans-Oxygen
rr rr rr rr rr rr rr rr rr rr
The small intestine is the main site of absorption. It can accomplish it so efficiently becaus
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
e of villi and microvilli that sculpt the membrane into hair-
rr rr rr rr rr rr rr rr rr rr
like projections. They likely aid in reabsorption by - ans-
rr rr rr rr rr rr rr rr rr
Increasing the surface area of the small intestine rr rr rr rr rr rr rr
The pancreas is a major accessory organ in the digestive system. Which of the following
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
would destroy the function of digestive products produced by the pancreas - ans-
rr rr rr rr rr rr rr rr rr rr rr rr
Increased acidity due to the inability to neutralize stomach acid rr rr rr rr rr rr rr rr rr
In animal cells, which of the following represents the most likely pathway that a secreted p
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
rotein takes as it is synthesized in a cell - ans-Ribosome - rough ER - Golgi apparatus -
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
secretory vesicle - plasma membrane
rr rr rr rr rr
All of the following statements are correct regarding alleles EXCEPT - ans-
rr rr rr rr rr rr rr rr rr rr rr
An individual with tow identical alleles is said to be heterozygous with respect to that gene
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
Once specific genes, such as the gene coding for ampicillin, have been incorporated into
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
a plasmid, the plasmid may be used to carry out a transformation, which is - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
Inserting it into a suitable bacterium rr rr rr rr rr
Although mutations occur at a regular and predictable rate, which of the following stateme
rr rr rr rr rr rr rr rr rr rr rr rr rr
nts is the LEAST likely reason the frequency of mutation often appears to be low - ans-
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
The predictable rate of mutation results in ongoing variability in a gene pool
rr rr rr rr rr rr rr rr rr rr rr rr
A scientist wants to test the effect of temperature on seed germination. Which of the follo
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
wing should be part of the experimental design - ans-
rr rr rr rr rr rr rr rr rr
Use the temperature as the independent variable and measure the rate of germination
rr rr rr rr rr rr rr rr rr rr rr rr
A mustard plant seed undergoes a polyploidy event resulting in the new plant's pollen bei
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
ng unable to pollinate the plant that originally produced the seed despite them being less t
rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr
han a meter. apart this best exemplifies which of the following - ans-
rr rr rr rr rr rr rr rr rr rr rr rr
Sympatric spectiation because the plants are not separated rr rr rr rr rr rr rr
Which of the following is the most correct concerning cell differentiation in vertebrae -
rr rr rr rr rr rr rr rr rr rr rr rr rr
ans-
rr
Differences in the timing and expression levels of different genes lead to structural and fu
rr rr rr rr rr rr rr rr rr rr rr rr rr rr
nctional differences rr
